Yesterday I found an egg on the floor of the coop and thought nothing of it. Just picked it up and kept going. Birdies seemed fine. This morning I went out to let them out and collect the eggs and I hung around and waited for two that were in the nest boxes to lay two more. While I was waiting, I noticed one of my RIR in the yard standing stock still, but having rhythmic contractions/movements of her bottom area--could see the feathers moving. So, finally the two in the nesting boxes finished and I went to pick up the one in the yard, as she had laid down right in the middle of the yard. When I picked her up, she didn't protest, but she barfed alot of liquid--they don't have a waterer in the coop at night, so it's possible she drank alot of water just as I let them out, and I felt her butt and abdomen and she doesn't act like she has an egg stuck or even rolling down the road, if you know what I mean......Her crop feels ok. Do you think it was just alot of water? Should I isolate her? I am freaking out! This has been a good bunch of chooks--haven't lost one!